Blowpipe.



nrvirm) 'strafrns PATENT orrioE-.g

w'ILLI'Aivri. REICH, or New Yoan, 1v. Y.

insegna.

A l'Specncaton of Letters 15atent.

Application ined Fetrumy 2o, 1909. serial ivo. 479,131.

- is a specification.

This invention relates to blow-pipes and has for itsobje'ct to provide a blow-pipe operative with safety of operation without danger of backlash explosions, having adaptability to different uses, and efficiency in operation.

A further object is to provide a combinedv blow-pipe and cutting device.

Hitherto, one serious danger attendant the use of blow-pipes was the likelihood of explosions brought about by back-flashes caused by the obstruction 'of the end of the blow-pipe.

One of the main objects of this invention is to overcome this disadvantage, and the cardinal principle underlying the means embodying this object is to entirely separate thel gas from the oxygen channels, have them within the 'shortest distance of each other,

' and interpose a valve between them. All of these part-s are so arranged as' to present to the ignited back-hash the least possible distance of explosive mixture before reaching the valve. Hitherto, also, the well-known blow-pipes could not be generally used in view of their lack of adaptability to nonaccessible places.

' Another object of this invent-ion is, therefore, to make the blow-pipe nozzle movable in respect to the blow-.pipe body so as to reach'places accessible only with diiiiculty.

A still further object of this invention is the combining of the nozzle with an oxygen current which results in thev simultaneous cooling of the nozzle and the capability of using it as a disintegrating nozzle depending on the disintegration of the carbon of the steel produced by the efect of oxygen on a heated piece of steel.

For' all these purposes, the invention consists of an improved blow-pipe having an oxygen-channel and a fuel-channel, and a valve interposed in one of the channels, and normally in such a position that on a back pressure in said channels the valve will close the saine. e

The invention consists further in providing a blow pipe with an oxygen chainber commnnicatingwith a high pressure source of oxygen, the stream of ,oxy, ',en emanating from the said chamber being intended to disintegrate the material heated by the flame of the blow pipe.

The invention consists further in an angularly disposed movable portion of a nozzle having channels in registration with the lcentral and annular channels of the blow-pipe adapted to be held in a certain position. `In the accompanying drawings, being part of this specification, Figure 1 is a vertical Patented May 19, 1914. i

longitudinal section 'of a blow-pipe showing an embodiment of the invent-ion. Fig. 2 is a view of the end of the stationary blow-pipe body with movable part removed, Fig. 3 is a plan-view of the valve, Fig. 4 is a view of the end of the movable member of the blowpipe body with nozzle removed, Fig. 5 is a top-view of the nozzle which abuts against the movable member of the blow-pipe body, Y

`and Fig. G is a front-view of the nozzle.

Similar reference characters indicate corresponding parts. .v

Referring to the drawings, the blow-pipe body 10 is provided, first, with a plurality'of fuel-channels 11 terminating at one end in registration with a supply-pipe 12, having a stop-cock I11, and at the other end in a c iroularly-'arranged chamber 13, and, secondly, with an oxygen-channel 14 terminating at one 'end in registration with a supply-pipe 15, having a stop-cock 51, and at the'other end with an orifice 16 substantially in vthe central part of the blow-pipe body 10. A nozzle 17 is provided with a central mixingchamber 18 terminating at one end in a central oxygen-channel 19 having arranged around it a plurality of fuel-'channels 2() and terminating atrthe other end in a channel 91 of a tip 92 having an orifice 93 whichis in- The channel 19 registers with the orifice of the oxygen-channel 14 and the channels 20 with the fuel-'chamber 13. A valve 22 is arraneed in the fnel-chamber 13 and 'consists of a circular plate 22, @Dmmung with-.a

shoulder 25 of the blow-pipe body, and being a. cold-plate ac-ts as an extinguisher to the back-fire. The blow-pipe nozzle is further provided with a chamber 27 in communication with a supply-channel 81 connected with'a pipe 31 having a valve 32, in communication wit-h a. source of oxygen under high pressure, which chamber 27 terminates in a second channel 29 of the end tip 92, the oritice 30 of which serves to direct `oxygen under high pressure against the material to be operated upon. This orifice 30 of the second channel 29, is arranged in 'closeproximity to the orifice 93, so that the oxygen st-ream will closely follow the main or fuel and mixture stream, in order not to give the heated metal a chance to cool whereby the action of the oxygen is intensied, the material operated upon disintegrated, and a smooth and quick cut of the steel obtained. Furthermore, the close proximity of the oxygen-channel brings about a cooling of the nozzle and tip by reason of the expansion of theoxygen under high pressure when emanating from the tip. It is well-known that a cooling effect is obtained by the expansion of a gas under high pressure, and this is relied upon to bring about the cooling when forced draft is used. If the cutting action is not required but the benefits of cooling nevertheless desired, then the stop 39 is removed and a natural draft obtained Vby air flowing through the orifice 30 and channel 49, the valve 32 being closed in the meantime, which draft is caused by the difference in tem erature of the air in the chamber 27, when t e same is in vertical position and by the currents induced by rapidly moving gases emitted from the nozzle.

The blow-pipe body l0 is composed of two parts, one being fixed and having pipes 12 and 15 secured to it, and the other movable in respect thereto but in communication therewith, and assembled thereto by a union joint 35. This permits the convenient movement of the movable part of the blow-pipe body in respect to the stationary part, so as to permit the blow-pipe nozzle which is secured to the movable part by the union joint 36 to be swung into any position desired. This enables t e blow-pipe to be directed against parts otherwise difficult of access. The channels of the movable part of the blow-pipe proper are so arranged as to al.- Ways registerwith the channels of the stationary part. The blow-pipe body portion is Y provided Nwith a screw-thread 50 which is engaged by an interior screw-thread 51 of the union joint 35. This union joint is provided with a Harige 52,` which engages a flange 53 of the movable portion. The4 body portion is provided with an annular groove 55 which communicates with a plurality of openings 56 through which the fuel passes. This annular groove is in registration with. the

channels 1l in the movable portion no matter in what position the 'movable portion may be.

The operation of the same is as follows: In order to present the shortest possible path of ignitable fuel to a back-flash the channels 20 are made of small diameter and as short as possible. mayjump from the outer end of the chamber to the inner end, it is advisable to make the multiple channels 20 of the smallest possible length and diameter so that the explosion passing through them willA be retarded and thereby not have a greater rate of velocity than the valve 22 which enables the valve to close before the ignited gases pass it. Conceivably the speed of an explosion may beso great as to cause the ignited mixture to pass the valve and its seat before the'motion of the valve will have been overcome, and, of course, the ignited mixture having once passed the valve the force of the current would be such as to prevent the closing of the valve. And the ignited flash once past the valve will travel rapidly along in the supply-pipe aided by the attendant current of oxygen until it reaches the fuel reservoir. The short length of the channel obviates this possibility entirely, and indeed the largevolume of the back-flash of the mixing-chamber being so suddenly divided when entering the short and separated channels of small diameter will lose a great part of its force, so much so that by the time the small and separated portions of the back-flash reach the valve, it will have ample time to close, being assisted therein lby the difference in pressure caused by the back-flash. Furthermore, the back fire striking the cold plate will fail to ignite the explosive gases behind itf The invention therefore consists in providing a blow-pipe having an oxygen-channel and a fuel-channel with a valve interposed in one of the channels and normally in such a position that on a back pressure in said channels the valve will close the same.

When it is desired to cut metal, the wellknown characteristic action of oxygen on the carbon of heated steel being yrelied upon, oxygen of high pressure is forced through the channel 27 and orice 30 and against the material; when the cutting isV not desired, then a natural cooling is effected as. de-

scribed. This part of the invention therefore consists in providing a blow-pipe with a channel for communicating with a high pressure source of oxygen, and providing means for causing a stream-of such oxygen to be directed against the material to be operated upon. Finally, when it is desired to change the position-of the blow-pipe during the operation of the same, the movable angular portion' with nozzle attached is turned to any angle so as to meet the exigency pre- While the back-Hash' noeaees tion with the stationary portion and rotatable upon the longitudinal axis of the `main portion, the movable portion being ca- Ipablc of being fixed in any position angularly in relation to the stationary portion. 'lllie lack of the disadvantages attendant the blow-pipes hitherto used are the advantages of my improved device, and it adds thereto the advantages of convenience, eciency and safety. Furthermore my improved device presents an automatic cleaning action in that when a back-flash occurs, the valve being suddenly'closed, the pressure in the chamber is suddenly increased, forcing out thereby any obstruction in the nozzle without interrupting the operation.

@ne embodiment of my invention has been shown, but ll do not wish to be understood to limit myself to the same, since changes may be made therein without departing from the spirit and underlying principle of my invention.

Having thus described my invention, ll claim as new and desire to secure by Letters Patent:

i. A. blow-pipe having an oxygen channel and a fuel channel separate from each other and having orifices in close proximity :to each other, andy a back-Hash check valve entirely within the fuel channel in close proximity to the orilices thereof and freely movable therein into and out of closing position. i

2. ln a blow-pipe, the combination of 'a blow-pipe body composed ot a stationary head having a central channel andan annular groove therein, an angular longitudinally fixed and axially rotatable movable portion havin separate channels registering in all positions of said portion with said first named channel and groove respectively, and detachable means securing the rotatable portion adjustably to said head.

3. lin a blow-pipe, the combination of a head having channels therein, lan angular movable portion having channels in registration with the channels ot said head, and

havin an outwardly projecting annular shoul er on its inner end, and a clamping ring having internal threads engaging said head. and having at its outer end an in' wardl-y disposed annular shoulder engaging the annular shoulder of the 'angular portion. j

Ll. A blow-pipe having an oxygen channel and a fuel chamber having outlet and inlet orifices and separated from communication with the oxygen channel in a gas-tight manner, and a back-Hash valve interposed entirely within the fuel chamber between its inlet and outlet orilices, and having tree limited movement therein into and' out of closing position.

5. A, device of the character described, comprising a nozzle member, a head connecting therewith, communicating with the head to supply gas thereto, and a valveinterposed between the head and the nozzle member and adapted to automatically shut ed the source of gassupply, .l

6. lln a device of the character described, the combination, with a nozzle having a mixing passage, and means for. supplying oxygen and acetylene gas to said passage, of an automatically operated valve adapted to cut on' the flow ot acetylene gas and located -adjacent the point in said passag where the two gases are designed te mixed. y

7. ln a device of the character described, the combination, with a nozzle having a mixing passage, and means for. supplying oxygen and acetylene gas to said passage, ot an automatically operated valve located adjacent the point in said passage where the two gases are designed to be mixed, said valve being normally held open by the pressure of the acetylene gas thereon but adapted to be closed for cutting od 'the How of acetylene gas in case of a back-Hash.

lln testimony, that ll claim the foregoing as my invent-ion, l have signed my name in presence of two subscribing witnesses.

y WILLIAM l. BEECH. Witnesses :5 v

FANNm Fisxn, C. lP. GOEPEL.

a source of gas-supply p 

